【Javaプログラミング】WicketでダイナミックなWeb開発！(後編)

フォームを使う

package jp.allabout;

import java.io.Serializable;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.form.*;
import org.apache.wicket.model.PropertyModel;

public class Page1 extends WebPage {
  private FormModelBean bean;

  public Page1() {
    bean = new FormModelBean("テキストを入力してください。","");
    PropertyModel messageModel = new PropertyModel(bean, "msgStr");
    PropertyModel inputModel = new PropertyModel(bean, "inputStr");
    Form form = new Form("form");
    Label label = new Label("message", messageModel);
    this.add(label);
    TextField field = new TextField("field",inputModel);
    form.add(field);
    FormButton button = new FormButton(this,"button");
    form.add(button);
    this.add(form);
  }

  public FormModelBean getBean() {
    return bean;
  }

  public void setBean(FormModelBean bean) {
    this.bean = bean;
  }
}

class FormModelBean implements Serializable {
  private String msgStr;
  private String inputStr;
  
  FormModelBean(String msg,String input){
    this.msgStr = msg;
    this.inputStr = input;
  }
  
  public String getMsgStr() {
    return msgStr;
  }

  public void setMsgStr(String msgStr) {
    this.msgStr = msgStr;
  }

  public String getInputStr() {
    return inputStr;
  }

  public void setInputStr(String inputStr) {
    this.inputStr = inputStr;
  }
  
}

class FormButton extends Button {
  private static final long serialVersionUID = 1L;
  private Page1 page;
  
  public FormButton(Page1 page, String s){
    super(s);
    this.page = page;
  }
  
  public void onSubmit() {
    String result = "あなたは「" + page.getBean().getInputStr() +
        "」と書きました。";
    page.getBean().setMsgStr(result);
  }
}